Battery Panic monitors the state of your battery and gives you three estimates, the current charge level, the rate of drain in percentage per hour and how much time left before your battery dies.
You can set alarms for each of the estimates: charge level (in percent), charge rate (in percent per hour) and time remaining (in hours and minutes). To set alarms, tap the notification icon in the middle of the screen.
You can adjust how far back in time Battery Panic looks at data to create estimates by sliding the graph left or right. The data you see on the graph is the data that is used to calculate estimates. The farther back you go, the more stable the estimates will be, but they will not react as quickly to current conditions. When using at a short time range for estimates the values will match current conditions closely, but may change drastically as those conditions change.